Defensive publication

ABSTRACT

THE ADDITION OF 0.05 TO 1% BY WEIGHT OF CARBON BLACK TO ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE RESULTS IN IMPROVED PHYSICAL PROPERTIES AS WELL AS EXTREMELY GOOD RF HEATING CHARACTERISTICS. THE IMPROVEMENT IN PHYSICAL PROPERTIES APPEARS AS IMPROVEMENT IN WET SAND ABRASION INDEX, DOUBLE NOTCHED IZOD IMPACT STRENGTH, TENSILE STRENGTH AND YIELD STRENGTH. IMPROVEMENTS OF 5 TO 25% AND MORE IN EACH OF THESE PARAMETERS HAVE BEEN OBSERVED DUE TO THE PRESENCE OF CARBON BLACK.

DEFENSW PULICATKQN UNITED STATES PATENT OFFICE Published at the requestof the applicant or owner in accordance with the Notice of Dec. 16,1969, 869 O.G. 687. The abstracts of Defensive Publication applicationsare identified by distinctly numbered series and are arrangedchronologically. The heading of each abstract indicates the number ofpages of specification, including claims and sheets of drawingscontained in the application as originally filed. The files of theseapplications are available to the public-for inspection and reproductionmay be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofiice makes no assertion as tothe novelty of the disclosed subject matter;

PUBLISHED AUGUST 8, 1972 T901,021 COMPOSITION COMPRISED 0F ULTRAHIGHMOLECULAR WEIGHT POLYETHYLENE CONTAINING CARBON BLACK Barry H. Vernick,Newark, DeL, assignor to Hercules Incorporated, Wilmington, Del. FiledJuly 6, 1971, Ser. No. 160,147 Int. C1. 0081!? 45/08 US. Cl. 260-41 R NoDrawing. 14 Pages Specification The addition of 0.05 to 1% by weight ofcarbon black to ultra high molecular Weight polyethylene results inimproved physical properties as well as extremely good RF heatingcharacteristics. The improvement in physical properties appears asimprovement in Wet sand abrasion index, double notched Izod impactstrength, tensile strength and yield strength. Improvements of 5 to 25%and more in each of these parameters have been observed due to thepresence of carbon black.

